src/gallium/state_trackers/xorg/xorg_dri2.c

   1 /*
   2  * Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
   3  * All Rights Reserved.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the
   7  * "Software"), to deal in the Software without restriction, including
   8  * without limitation the rights to use, copy, modify, merge, publish,
   9  * distribute, sub license, and/or sell copies of the Software, and to
  10  * permit persons to whom the Software is furnished to do so, subject to
  11  * the following conditions:
  12  *
  13  * The above copyright notice and this permission notice (including the
  14  * next paragraph) shall be included in all copies or substantial portions
  15  * of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  19  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  20  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  21  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  22  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  23  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  24  *
  25  *
  26  * Author: Alan Hourihane <alanh@tungstengraphics.com>
  27  * Author: Jakob Bornecrantz <wallbraker@gmail.com>
  28  *
  29  */
  30
  31 #include "xorg-server.h"
  32 #include "xf86.h"
  33 #include "xf86_OSproc.h"
  34
  35 #include "xorg_tracker.h"
  36 #include "xorg_exa.h"
  37
  38 #include "dri2.h"
  39
  40 #include "pipe/p_state.h"
  41 #include "util/u_inlines.h"
  42
  43 #include "util/u_format.h"
  44
  45 /* Make all the #if cases in the code esier to read */
  46 #ifndef DRI2INFOREC_VERSION
  47 #define DRI2INFOREC_VERSION 1
  48 #endif
  49
  50 #if DRI2INFOREC_VERSION == 2
  51 static Bool set_format_in_do_create_buffer;
  52 #endif
  53
  54 typedef struct {
  55     PixmapPtr pPixmap;
  56     struct pipe_texture *tex;
  57     struct pipe_fence_handle *fence;
  58 } *BufferPrivatePtr;
  59
  60 static Bool
  61 dri2_do_create_buffer(DrawablePtr pDraw, DRI2BufferPtr buffer, unsigned int format)
  62 {
  63     struct pipe_texture *tex = NULL;
  64     ScreenPtr pScreen = pDraw->pScreen;
  65     ScrnInfoPtr pScrn = xf86Screens[pScreen->myNum];
  66     modesettingPtr ms = modesettingPTR(pScrn);
  67     struct exa_pixmap_priv *exa_priv;
  68     BufferPrivatePtr private = buffer->driverPrivate;
  69     PixmapPtr pPixmap;
  70     unsigned stride, handle;
  71
  72     if (pDraw->type == DRAWABLE_PIXMAP)
  73         pPixmap = (PixmapPtr) pDraw;
  74     else
  75         pPixmap = (*pScreen->GetWindowPixmap)((WindowPtr) pDraw);
  76     exa_priv = exaGetPixmapDriverPrivate(pPixmap);
  77
  78     switch (buffer->attachment) {
  79     default:
  80         if (buffer->attachment != DRI2BufferFakeFrontLeft ||
  81             pDraw->type != DRAWABLE_PIXMAP) {
  82             private->pPixmap = (*pScreen->CreatePixmap)(pScreen, pDraw->width,
  83                                                         pDraw->height,
  84                                                         pDraw->depth,
  85                                                         0);
  86         }
  87         break;
  88     case DRI2BufferFrontLeft:
  89         break;
  90     case DRI2BufferStencil:
  91 #if DRI2INFOREC_VERSION >= 3
  92     case DRI2BufferDepthStencil:
  93 #else
  94     /* Works on old X servers because sanity checking is for the weak */
  95     case 9:
  96 #endif
  97         if (exa_priv->depth_stencil_tex &&
  98             !util_format_is_depth_or_stencil(exa_priv->depth_stencil_tex->format))
  99             exa_priv->depth_stencil_tex = NULL;
 100         /* Fall through */
 101     case DRI2BufferDepth:
 102         if (exa_priv->depth_stencil_tex)
 103             pipe_texture_reference(&tex, exa_priv->depth_stencil_tex);
 104         else {
 105             struct pipe_texture template;
 106             unsigned depthBits = (format != 0) ? format : pDraw->depth;
 107             memset(&template, 0, sizeof(template));
 108             template.target = PIPE_TEXTURE_2D;
 109             if (buffer->attachment == DRI2BufferDepth) {
 110                switch(depthBits) {
 111                case 16:
 112                   template.format = PIPE_FORMAT_Z16_UNORM;
 113                   break;
 114                case 32:
 115                   template.format = PIPE_FORMAT_Z32_UNORM;
 116                   break;
 117                default:
 118                   template.format = ms->ds_depth_bits_last ?
 119                                     PIPE_FORMAT_X8Z24_UNORM : PIPE_FORMAT_Z24X8_UNORM;
 120                   break;
 121                }
 122             } else {
 123                template.format = ms->ds_depth_bits_last ?
 124                                  PIPE_FORMAT_S8Z24_UNORM : PIPE_FORMAT_Z24S8_UNORM;
 125             }
 126             template.width0 = pDraw->width;
 127             template.height0 = pDraw->height;
 128             template.depth0 = 1;
 129             template.last_level = 0;
 130             template.tex_usage = PIPE_TEXTURE_USAGE_DEPTH_STENCIL |
 131                 PIPE_TEXTURE_USAGE_DISPLAY_TARGET;
 132             tex = ms->screen->texture_create(ms->screen, &template);
 133             pipe_texture_reference(&exa_priv->depth_stencil_tex, tex);
 134         }
 135         break;
 136     }
 137
 138     if (!private->pPixmap) {
 139         private->pPixmap = pPixmap;
 140         pPixmap->refcnt++;
 141     }
 142
 143     if (!tex) {
 144         /* First call to make sure we have a pixmap private */
 145         exaMoveInPixmap(private->pPixmap);
 146         xorg_exa_set_shared_usage(private->pPixmap);
 147         pScreen->ModifyPixmapHeader(private->pPixmap, 0, 0, 0, 0, 0, NULL);
 148         /* Second call to make sure texture has valid contents */
 149         exaMoveInPixmap(private->pPixmap);
 150         tex = xorg_exa_get_texture(private->pPixmap);
 151     }
 152
 153     if (!tex)
 154         FatalError("NO TEXTURE IN DRI2\n");
 155
 156     ms->api->shared_handle_from_texture(ms->api, ms->screen, tex, &stride, &handle);
 157
 158     buffer->name = handle;
 159     buffer->pitch = stride;
 160     buffer->cpp = 4;
 161     buffer->driverPrivate = private;
 162     buffer->flags = 0; /* not tiled */
 163 #if DRI2INFOREC_VERSION == 2
 164     /* ABI forwards/backwards compatibility */
 165     if (set_format_in_do_create_buffer)
 166         ((DRI2Buffer2Ptr)buffer)->format = 0;
 167 #elif DRI2INFOREC_VERSION >= 3
 168     buffer->format = 0;
 169 #endif
 170     private->tex = tex;
 171
 172     return TRUE;
 173 }
 174
 175 static void
 176 dri2_do_destroy_buffer(DrawablePtr pDraw, DRI2BufferPtr buffer)
 177 {
 178     ScreenPtr pScreen = pDraw->pScreen;
 179     ScrnInfoPtr pScrn = xf86Screens[pScreen->myNum];
 180     modesettingPtr ms = modesettingPTR(pScrn);
 181     BufferPrivatePtr private = buffer->driverPrivate;
 182     struct exa_pixmap_priv *exa_priv = exaGetPixmapDriverPrivate(private->pPixmap);
 183
 184     pipe_texture_reference(&private->tex, NULL);
 185     ms->screen->fence_reference(ms->screen, &private->fence, NULL);
 186     pipe_texture_reference(&exa_priv->depth_stencil_tex, NULL);
 187     (*pScreen->DestroyPixmap)(private->pPixmap);
 188 }
 189
 190 #if DRI2INFOREC_VERSION >= 2
 191
 192 static DRI2Buffer2Ptr
 193 dri2_create_buffer(DrawablePtr pDraw, unsigned int attachment, unsigned int format)
 194 {
 195     DRI2Buffer2Ptr buffer;
 196     BufferPrivatePtr private;
 197
 198     buffer = xcalloc(1, sizeof *buffer);
 199     if (!buffer)
 200         return NULL;
 201
 202     private = xcalloc(1, sizeof *private);
 203     if (!private) {
 204         goto fail;
 205     }
 206
 207     buffer->attachment = attachment;
 208     buffer->driverPrivate = private;
 209
 210     /* So far it is safe to downcast a DRI2Buffer2Ptr to DRI2BufferPtr */
 211     if (dri2_do_create_buffer(pDraw, (DRI2BufferPtr)buffer, format))
 212         return buffer;
 213
 214     xfree(private);
 215 fail:
 216     xfree(buffer);
 217     return NULL;
 218 }
 219
 220 static void
 221 dri2_destroy_buffer(DrawablePtr pDraw, DRI2Buffer2Ptr buffer)
 222 {
 223     /* So far it is safe to downcast a DRI2Buffer2Ptr to DRI2BufferPtr */
 224     dri2_do_destroy_buffer(pDraw, (DRI2BufferPtr)buffer);
 225
 226     xfree(buffer->driverPrivate);
 227     xfree(buffer);
 228 }
 229
 230 #endif /* DRI2INFOREC_VERSION >= 2 */
 231
 232 #if DRI2INFOREC_VERSION <= 2
 233
 234 static DRI2BufferPtr
 235 dri2_create_buffers(DrawablePtr pDraw, unsigned int *attachments, int count)
 236 {
 237     BufferPrivatePtr privates;
 238     DRI2BufferPtr buffers;
 239     int i;
 240
 241     buffers = xcalloc(count, sizeof *buffers);
 242     if (!buffers)
 243         goto fail_buffers;
 244
 245     privates = xcalloc(count, sizeof *privates);
 246     if (!privates)
 247         goto fail_privates;
 248
 249     for (i = 0; i < count; i++) {
 250         buffers[i].attachment = attachments[i];
 251         buffers[i].driverPrivate = &privates[i];
 252
 253         if (!dri2_do_create_buffer(pDraw, &buffers[i], 0))
 254             goto fail;
 255     }
 256
 257     return buffers;
 258
 259 fail:
 260     xfree(privates);
 261 fail_privates:
 262     xfree(buffers);
 263 fail_buffers:
 264     return NULL;
 265 }
 266
 267 static void
 268 dri2_destroy_buffers(DrawablePtr pDraw, DRI2BufferPtr buffers, int count)
 269 {
 270     int i;
 271
 272     for (i = 0; i < count; i++) {
 273         dri2_do_destroy_buffer(pDraw, &buffers[i]);
 274     }
 275
 276     if (buffers) {
 277         xfree(buffers[0].driverPrivate);
 278         xfree(buffers);
 279     }
 280 }
 281
 282 #endif /* DRI2INFOREC_VERSION <= 2 */
 283
 284 static void
 285 dri2_copy_region(DrawablePtr pDraw, RegionPtr pRegion,
 286                  DRI2BufferPtr pDestBuffer, DRI2BufferPtr pSrcBuffer)
 287 {
 288     ScreenPtr pScreen = pDraw->pScreen;
 289     ScrnInfoPtr pScrn = xf86Screens[pScreen->myNum];
 290     modesettingPtr ms = modesettingPTR(pScrn);
 291     BufferPrivatePtr dst_priv = pDestBuffer->driverPrivate;
 292     BufferPrivatePtr src_priv = pSrcBuffer->driverPrivate;
 293     DrawablePtr src_draw;
 294     DrawablePtr dst_draw;
 295     GCPtr gc;
 296     RegionPtr copy_clip;
 297     Bool save_accel;
 298
 299     /*
 300      * In driCreateBuffers we dewrap windows into the
 301      * backing pixmaps in order to get to the texture.
 302      * We need to use the real drawable in CopyArea
 303      * so that cliprects and offsets are correct.
 304      */
 305     src_draw = (pSrcBuffer->attachment == DRI2BufferFrontLeft) ? pDraw :
 306        &src_priv->pPixmap->drawable;
 307     dst_draw = (pDestBuffer->attachment == DRI2BufferFrontLeft) ? pDraw :
 308        &dst_priv->pPixmap->drawable;
 309
 310     /*
 311      * The clients implements glXWaitX with a copy front to fake and then
 312      * waiting on the server to signal its completion of it. While
 313      * glXWaitGL is a client side flush and a copy from fake to front.
 314      * This is how it is done in the DRI2 protocol, how ever depending
 315      * which type of drawables the server does things a bit differently
 316      * then what the protocol says as the fake and front are the same.
 317      *
 318      * for pixmaps glXWaitX is a server flush.
 319      * for pixmaps glXWaitGL is a client flush.
 320      * for windows glXWaitX is a copy from front to fake then a server flush.
 321      * for windows glXWaitGL is a client flush then a copy from fake to front.
 322      *
 323      * XXX in the windows case this code always flushes but that isn't a
 324      * must in the glXWaitGL case but we don't know if this is a glXWaitGL
 325      * or a glFlush/glFinish call.
 326      */
 327     if (dst_priv->pPixmap == src_priv->pPixmap) {
 328         /* pixmap glXWaitX */
 329         if (pSrcBuffer->attachment == DRI2BufferFrontLeft &&
 330             pDestBuffer->attachment == DRI2BufferFakeFrontLeft) {
 331             ms->ctx->flush(ms->ctx, PIPE_FLUSH_SWAPBUFFERS, NULL);
 332             return;
 333         }
 334         /* pixmap glXWaitGL */
 335         if (pDestBuffer->attachment == DRI2BufferFrontLeft &&
 336             pSrcBuffer->attachment == DRI2BufferFakeFrontLeft) {
 337             return;
 338         } else {
 339             xf86DrvMsg(pScrn->scrnIndex, X_WARNING,
 340                 "copying between the same pixmap\n");
 341         }
 342     }
 343
 344     gc = GetScratchGC(pDraw->depth, pScreen);
 345     copy_clip = REGION_CREATE(pScreen, NULL, 0);
 346     REGION_COPY(pScreen, copy_clip, pRegion);
 347     (*gc->funcs->ChangeClip) (gc, CT_REGION, copy_clip, 0);
 348     ValidateGC(dst_draw, gc);
 349
 350     /* If this is a full buffer swap, throttle on the previous one */
 351     if (dst_priv->fence && REGION_NUM_RECTS(pRegion) == 1) {
 352         BoxPtr extents = REGION_EXTENTS(pScreen, pRegion);
 353
 354         if (extents->x1 == 0 && extents->y1 == 0 &&
 355             extents->x2 == pDraw->width && extents->y2 == pDraw->height) {
 356             ms->screen->fence_finish(ms->screen, dst_priv->fence, 0);
 357             ms->screen->fence_reference(ms->screen, &dst_priv->fence, NULL);
 358         }
 359     }
 360
 361     /* Try to make sure the blit will be accelerated */
 362     save_accel = ms->exa->accel;
 363     ms->exa->accel = TRUE;
 364
 365     /* In case it won't be though, make sure the GPU copy contents of the
 366      * source pixmap will be used for the software fallback - presumably the
 367      * client modified them before calling in here.
 368      */
 369     exaMoveInPixmap(src_priv->pPixmap);
 370     DamageRegionAppend(src_draw, pRegion);
 371     DamageRegionProcessPending(src_draw);
 372
 373     (*gc->ops->CopyArea)(src_draw, dst_draw, gc,
 374                          0, 0, pDraw->width, pDraw->height, 0, 0);
 375     ms->exa->accel = save_accel;
 376
 377     FreeScratchGC(gc);
 378
 379     ms->ctx->flush(ms->ctx, PIPE_FLUSH_SWAPBUFFERS,
 380                    pDestBuffer->attachment == DRI2BufferFrontLeft ?
 381                    &dst_priv->fence : NULL);
 382 }
 383
 384 Bool
 385 xorg_dri2_init(ScreenPtr pScreen)
 386 {
 387     ScrnInfoPtr pScrn = xf86Screens[pScreen->myNum];
 388     modesettingPtr ms = modesettingPTR(pScrn);
 389     DRI2InfoRec dri2info;
 390 #if DRI2INFOREC_VERSION >= 2
 391     int major, minor;
 392
 393     if (xf86LoaderCheckSymbol("DRI2Version")) {
 394         DRI2Version(&major, &minor);
 395     } else {
 396         /* Assume version 1.0 */
 397         major = 1;
 398         minor = 0;
 399     }
 400 #endif
 401
 402     dri2info.version = DRI2INFOREC_VERSION;
 403     dri2info.fd = ms->fd;
 404
 405     dri2info.driverName = pScrn->driverName;
 406     dri2info.deviceName = "/dev/dri/card0"; /* FIXME */
 407
 408 #if DRI2INFOREC_VERSION >= 2
 409     dri2info.CreateBuffer = dri2_create_buffer;
 410     dri2info.DestroyBuffer = dri2_destroy_buffer;
 411 #endif
 412
 413     /* For X servers in the 1.6.x series there where two DRI2 version.
 414      * This allows us to build one binary that works on both servers.
 415      */
 416 #if DRI2INFOREC_VERSION == 2
 417     if (minor == 0) {
 418         set_format_in_do_create_buffer = FALSE;
 419         dri2info.CreateBuffers = dri2_create_buffers;
 420         dri2info.DestroyBuffers = dri2_destroy_buffers;
 421     } else
 422         set_format_in_do_create_buffer = FALSE;
 423 #endif
 424
 425     /* For version 1 set these unconditionaly. */
 426 #if DRI2INFOREC_VERSION == 1
 427     dri2info.CreateBuffers = dri2_create_buffers;
 428     dri2info.DestroyBuffers = dri2_destroy_buffers;
 429 #endif
 430     dri2info.CopyRegion = dri2_copy_region;
 431     dri2info.Wait = NULL;
 432
 433     ms->d_depth_bits_last =
 434          ms->screen->is_format_supported(ms->screen, PIPE_FORMAT_X8Z24_UNORM,
 435                                          PIPE_TEXTURE_2D,
 436                                          PIPE_TEXTURE_USAGE_DEPTH_STENCIL, 0);
 437     ms->ds_depth_bits_last =
 438          ms->screen->is_format_supported(ms->screen, PIPE_FORMAT_S8Z24_UNORM,
 439                                          PIPE_TEXTURE_2D,
 440                                          PIPE_TEXTURE_USAGE_DEPTH_STENCIL, 0);
 441
 442     return DRI2ScreenInit(pScreen, &dri2info);
 443 }
 444
 445 void
 446 xorg_dri2_close(ScreenPtr pScreen)
 447 {
 448     DRI2CloseScreen(pScreen);
 449 }
 450
 451 /* vim: set sw=4 ts=8 sts=4: */